| 摘要 |
PURPOSE: To suppress fluctuation in the vibration suppressing effect among the products by exhibiting high vibration suppressing effect in a structure for supporting the rotor shaft of a motor through a ball bearing without requiring strict control of the gap between the outer ring and the inner wall face of a bearing box or the gap between the inner ring and the rotor shaft. CONSTITUTION: A shifted load is applied by a leaf spring 25 mounted on the bottom of a bearing box asymmetrically to the axis to push back the upper part of the outer ring 21o of a ball bearing supporting the forward end part of an armature shaft 7 thus inclining the ball bearing in the direction of thrust. The outer ring 21o of the ball bearing touches the inner wall 5a of the bearing box at the bottom part or restrained to limit the gap thus suppressing vibration. |
